A kind of synthesis gas separation device and method

Abstract

The invention provides a synthesis gas separation device and method. The separation device of the synthesis gas comprises: a first washing tower, a second washing tower, a flash tower, a first separation tower, a second separation tower, a first separation tank and a second separation tank; the first separation tank is connected with the first separation tank respectively. The washing tower is communicated with the flash tower; the second separating tank is communicated with the second washing tower and the flash tower respectively; the first washing tower is communicated with the flash tower, the second washing tower is communicated with the flash tower, and the flash tower is connected with the first The separation towers are communicated, the first separation tower is communicated with the second separation tower, the second separation tower is communicated with the first washing tower, and the first separation tower is communicated with the second washing tower. The present invention also provides a separation method utilizing the separation device described above. The separation device and method of the present invention can simultaneously produce OXO products, pure H 2 and pure CO product, pure H 2 And pure CO product purity can reach more than 99v%.

Description

technical field [0001] The invention relates to a separation device and method, in particular to a synthesis gas separation device and method, and belongs to the technical field of gas separation. Background technique [0002] At present, the partial condensation process, methane washing process and carbon monoxide washing process are widely used in the cryogenic separation of syngas, but when the raw syngas contains H 2 , CO, CH 4 , N 2 When the components are equal, the above-mentioned processes need to be combined with other processes to simultaneously produce OXO(H 2 and CO mixture), pure H 2 and pure CO. [0003] The existing methods for processing synthesis gas mainly include the following: [0004] Example 1: Partial condensation process. Such as coal water slurry or dry coal gasification, no matter whether the raw syngas contains CH 4 , N 2 No matter how low the content of components or these components is, the process cannot directly obtain pure H 2 (99v%+)...

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Problems solved by technology

[0010] Since the raw syngas contains more CH 4 , OXO and pure H cannot be obtained at the same time according to the existing conventional cryogenic separation process 2 and pure CO products, pressure swing adsorption must be set to produce H 2 unit can be realized

[0011] When the scale of the device is very large, the PSA H 2 It occupies a huge area, and it is almost impossible to arrange it in a factory area with a limited area, and when the pressure swing adsorption system H 2 Equipment, program-controlled valves, and adsorbents become expensive due to their large scale, which also makes the economics of the entire chemical plant device poor.

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